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Near the surface of Earth, an electric field points radially downward and has a magnitude of approximately 100 N/C. 1) What charge (magnitude and sign) would have to be placed on a penny that has a mass of 3.11 g to cause it to rise into the air with an upward acceleration of 0.590 m/s? (Express your answer to three significant figures.) -0.00000323 mC Submit You currently have 5 submissions for this question. Only 10 submission are allowed. You can make 5 more submissions for this question. Your submissions: -0.00000323 X Computed value: -0.00000323 Submitted: Tuesday, June 29 at 6:38 PM Feedback: It appears you have made a power of ten error